Wrench.



S. L. MURPHY.

' WRENCH.

APPLICATION HLED JULY 6. m5.

1,175,547. Patented Mar. 14,1916.

THE COLUMBIA PLArjoGRAPl-l C0,, WASHINGTON, D. c.

85 particularly-"p'ointedout inthe claims 'which erases ame MURPHY, or om, ivrrssrssrrrr.

wimlvoii.

Specification of Letters Patent.

Patented Mar. 14, 1916.

Application filed July 6, 1915; Serial No. 38,216.

To, all whom it may concern:

Be it known that 1,,SPENGER L. MURPHY,

a citizen of the-United States, residing at West Point, in the county of Clay and State construction of the means by which the.

movable jaw of; the wrench is held in ad justed position. I

Another and more specific object ofi'the invention is to provide wrench embodyinga shank, fixed jaw, a movable jaw and a holding mechanismfor maintaining the movable aw in adjusted position, which holding mechanism includes broadly a slide mounted upon the shank, pawl pivoted in the slide and" engageable with rack teeth upon the shank for holding the slide in ad justed position, and a means whereby the movable jaw may be further and more mi nutely adjusted after the slidehas been initiallyadjusted'. v

The above, and other-incidental objects of a similar nature, which will beherein after more specifically treated are accom} plished such" means as are illustrated the l accompanying drawings, described in the following specification, and thenmore are! appended hereto and form p'art' of this application; r v *7 x A Withreference to" the drawings; wherein there {has been illustrated thepreferred em-f b'odiment of this invention," it, isred-uced to practice,- and tliroughout 'theseveral views of which similar reference-numerals designate corresponding 1 parts; Figure- 1- 1s side elevation, of a wrench*,1the"sli-de being shown in section; Fig: 2 is a section entire line-2-2,* of F ig. 1'; Fig. 3Tis side eleva tics of, a -modifie'd form of" a wrench, a; portion of the side being broken away- ,;;Fi'g. 4 is a detailcview illustrating the manner form are associated; and Fig. 5 is a? detail top plan view of the two pawls and adjoining parts ofthewrench:

tirety in Fig. 1 thereof, the wrench of the present invention includes as its essential elements, a shank 10 having an integral fixed jaw, 11-; a movable jaw lz; a slide. i5, which 18; mounted on, the shank, a pawl ll, by means of which the slide is heldin adjusted position upon the shank, and a millednut l5, by means of which the movable aw may befurther adjusted with respect to the element clamped by, the wrench, after it has been initially adjusted by manipulation of the-slide.

Theshank l0 and fixed jaw 11 are formed inthe, usual and well known manner and.

may be of any desired design; lt isipref section, in order that the yoke 16 of the movable aw may beheld against rotation on the shanks 1n this connection, it will be obvious, however, that the shank may be hexagonal or any other desired cross sec tion, except circular, without departing in anyv way fromthe spirit of the present in vention; Asshownin Fig. 1' particularly, the yoke l6, whichlforms an lntegral part of themovable jaw 12, is disposed to embrace. the shank 10 so that the movable" j aw may be properlysupported upon the shankfor movement thereon towardand away from thefixed jaw; Upon that face of the shank along which the movable jaw slides is formed, in the preferred embodiment'ofthe tool, a longitudinal series of transversely disposed rack teeth, indicated erable that'the shank be rectangular in cross at-17. These teeth are engageable by the p pawll in a anner and for a reason which will: be hereinafter fully'explained.

The slide 13 is preferably formed in the nature of a singlemetallic casting. and is referably rect ngular'in shape so that it may snugly embrace the shank l0 and, at

the; same time, slide I thereon. The slide is heldin adjusted position on the shank by means of the pawl heretofore designated by the numeral 14:: This pawl is preferably formed as aw'ec'lge-shaped metal block, the lower end of which is adapted to move througlra slot1'8 formed in the top Wall of a slide sleeve 13'. A" pair of transversely spaced,'- a'pertured cars 19 are formed in tegrally'witlr the top of theslide sleeve and arearra'nged, as shown best in ig. l to receive the pin or axle 20, uponwhich the arm 21 of the: pawl 14 isppivoted. It'will 1 lie "understood" that the arm" 21 may either be.- ormedj as: an integral part of the pawl or may be separately formed and secured thereto in any desired manner. A. leaf spring, indicatedat 22 is interposed between the pawl arm and the adjacent face of the slide 13. against the outer end of the pawl arm so that thepawl will be normally held in engagement with the rack teeth 17, whereby the slide will be maintained against movement away from the fixed jaw 11; The rear end of the pawl arm is shaped to form a 7 thumb piece I so that the user of' the wrench may easily and conveniently depress 7 1 Referring now to Fig. 1 particularly, it

the rear end of the pawl arm to raise the pawl and permit the further adjustment of the slide 13 upon the wrench shank. a

In order that the slide sleeve 13 may be moved easily and without undue friction on the shank 10, this member is provided on oppositesides of the toothed face with the longitudinal grooves 28, in which operate 7 the antl-frlction rollers 29.

.29 are ournaled upon an axle and are These rollers seated within recesses 31 formed in the shoulder 26, to be hereinafter described.

will be seen that from the rear face of the movable jaw 12,. there extends a stem or shank 2 1, which is threaded at its rear portion, as indicated at 25, to receive the milled adjusting nut 15. The nut 15is arranged to abut against the forward face of a shoulder i. 26 which is preferably formed as an integral part ofthe slide member 13 and extends at rightangles thereto. Obviously, aswill be seenbest uponreference to Fig. 1, the nut may be turned toiadjust the movable jaw 12,with respect to-the slide member 13, after this member has been initially ads justed; V It. now becomes apparentthat it is neces:. sary to provide some means for holding the adjusting nut 15 against lateral movement so that it may not become disengaged from theshoulder 26. In this connection, I'employ a sheet metalhocl; 27, which is carried by the shoulder 26. This hook as best shown in Fig. 1 receives the lower portion of the V nut and serves to prevent the lateral movement of this member. I desire to explain, in this connection, that while the'hook member 27 in the preferred form of the invention, is employed to hold. thenut against lateral movement, any other equivalent device or devices (such as lugs, projecting from the shoulder on opposite sides ofthe nut) may be substituted therefor, without departing from thepurview of this invention. i

The actual construction and arrangement ofthe several parts of the preferred form of the wrench, being thus described, it now remains to explain briefly the manner in whichthe movablej aw is adjusted withrespect to the fixed jaw. In this connection, reference will be had particularly to Fig. 1,

This spring is disposed to bear 7 wherein it will be seenthat the movable jaw 12 may be initially adjusted, by releasing the pawll l'in the manner previously explained and. adjusting the slide sleeve 18 longitudinally on the shank,'to dispose the movable r jaw at the approximate desired distance from the fixed jaw. By making the rack teeth 17 relatively small, the slide member 13 may, itself, be employed to adjust the movable jaw, .by steps of one-eighth of an shank, I employ a modified structure as shown inFigs. 3,4 and 5; As shown in these figures, the shank is provided with two parallel longitudinal series oflteeth 17 and 17?, the teeth of the one series being staggered with respect to the teeth of the other series. In the modified form of the invention, the slide is provided with a pair of pawls 14: and 14", instead'tof but one paw-l,'as in the preferred form. The pawl teeth 17, while the pawl 1a is .disposed for engagement with the teeth 17*. .Thus, it

will be seen that while the teeth are the same distance apart, as they are in the preferred formof the wrench, they :are vsov arranged r that, the slide -may be adjustedrin spaces which are one-thirty-second of an inch in length, even though the space between the 14 is disposedfor engagement with the V teeth of each series is. but one-sixteenth of an inch.

In reduction to practice,ithas beenfound that the form of, this invention illustrated in the drawings, and referred to in theabove description asthe preferred embodiment, is

the, mosteflicient and practical; yet realiz ingtjhat the conditions concurrent with the adoption ofthis device will necessarily vary,

it is..desirable to emphasize the fact that various minor changes in the details of con struction, proportion and arrangement of parts maybe resorted to, when required, withoutsacrificing any of the advantages of this-invention, as defined by the appended claims. J

' lWhat isclaimed is i 1 r '1.' A. ;wrench including a. shank having a fixed jaw, a movable-j aw slidablymounted upon: the shank, slidepembracing the shank and. longitudflnally movable thereon,

rollers'mounted upon the slide andengaging against the hank to hold th t wa l of the slide upon which the rollers are mounted in spaced relation to the face of the shank, said face of the shank being provided with a longitudinally extending series of rack teeth disposed between said rollers, a pawl mounted upon the slide adapted to engage the rack teeth to hold the slide in adjusted position, and means engaging the slide for shifting the movable jaw relative to the slide but permitting the movable jaw to move with the slide.

2. A wrench including a shank having a fixed jaw, a movable jaw slidably mounted upon the shank, a slide embracing the shank and movable therealong and having a laterally extending shoulder, the shank having rack teeth upon that face confronting the shoulder of the slide, rollers journaled in the slide and bearing against the shank on each side of the rack teeth and holding that wall of the slideupon which the rollers are mounted in spaced relation to the teeth on the shank, a nut carried by the slide, the movable jaw having a screw threaded shank engaging said nut, and a pawl carried by the slide and engageable with the rack teeth on the same.

3. In a wrench, a shank, a fixed jaw thereon, a movable jaw slidably mounted upon the shank, one face of the shank being Copies of this patent may be obtained for five'lce nts each, by addressing the formed with a medially disposed rib having rack teeth thereon, a slide mounted upon the shank, means mounted upon the slide and engaging the shank on each side of said rack teeth and holding that portion of the slide which confronts the teeth in spaced slide, recesses formed in opposite sides of the shoulder, rollers journaled in said recesses, the shank being provided on opposite edges with parallel longitudinal grooves, said rollers being disposed for movement through said grooves, means for holding the slide in adjusted position upon the shank,

and means connecting the shoulder and movable jaw.

In testimony whereof I hereunto aliix my signature in the presence of two witnesses.

SPENCER LEROY MURPHY.

Witnesses:

J. A. LAMB, O. J. MURPHY.

Commissioner of Patents Washington, D. 0. 

